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freebsd-nq/sys/dev/ioat/ioat_internal.h
Alexander Motin 1f4a469d36 Cleanup address range checks in ioat(4). 
- Deduce allowed address range for bus_dma(9) from the hardware version.
Different versions (CPU generations) have different documented limits.
 - Remove difference between address ranges for src/dst and crc.  At least
docs for few recent generations of CPUs do not mention anything like that,
while older are already limited with above limits.
 - Remove address assertions from arguments.  While I do not think the
addresses out of allowed ranges should realistically happen there due to
the platforms physical address limitations, there is now bus_dma(9) to
make sure of that, preferably via IOMMU.
 - Since crc now has the same address range as src/dst, remove crc_dmamap,
reusing dst2_dmamap instead.

Discussed with:	cem
MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
2019-11-15 22:47:59 +00:00

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/*-
* Copyright (C) 2012 Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
__FBSDID("$FreeBSD$");
#ifndef __IOAT_INTERNAL_H__
#define __IOAT_INTERNAL_H__
#include <sys/_task.h>
#define DEVICE2SOFTC(dev) ((struct ioat_softc *) device_get_softc(dev))
#define KTR_IOAT KTR_SPARE3
#define ioat_read_chancnt(ioat) \
ioat_read_1((ioat), IOAT_CHANCNT_OFFSET)
#define ioat_read_xfercap(ioat) \
(ioat_read_1((ioat), IOAT_XFERCAP_OFFSET) & IOAT_XFERCAP_VALID_MASK)
#define ioat_write_intrctrl(ioat, value) \
ioat_write_1((ioat), IOAT_INTRCTRL_OFFSET, (value))
#define ioat_read_cbver(ioat) \
(ioat_read_1((ioat), IOAT_CBVER_OFFSET) & 0xFF)
#define ioat_read_dmacapability(ioat) \
ioat_read_4((ioat), IOAT_DMACAPABILITY_OFFSET)
#define ioat_write_chanctrl(ioat, value) \
ioat_write_2((ioat), IOAT_CHANCTRL_OFFSET, (value))
static __inline uint64_t
ioat_bus_space_read_8_lower_first(bus_space_tag_t tag,
bus_space_handle_t handle, bus_size_t offset)
{
return (bus_space_read_4(tag, handle, offset) |
((uint64_t)bus_space_read_4(tag, handle, offset + 4)) << 32);
}
static __inline void
ioat_bus_space_write_8_lower_first(bus_space_tag_t tag,
bus_space_handle_t handle, bus_size_t offset, uint64_t val)
{
bus_space_write_4(tag, handle, offset, val);
bus_space_write_4(tag, handle, offset + 4, val >> 32);
}
#ifdef __i386__
#define ioat_bus_space_read_8 ioat_bus_space_read_8_lower_first
#define ioat_bus_space_write_8 ioat_bus_space_write_8_lower_first
#else
#define ioat_bus_space_read_8(tag, handle, offset) \
bus_space_read_8((tag), (handle), (offset))
#define ioat_bus_space_write_8(tag, handle, offset, val) \
bus_space_write_8((tag), (handle), (offset), (val))
#endif
#define ioat_read_1(ioat, offset) \
bus_space_read_1((ioat)->pci_bus_tag, (ioat)->pci_bus_handle, \
(offset))
#define ioat_read_2(ioat, offset) \
bus_space_read_2((ioat)->pci_bus_tag, (ioat)->pci_bus_handle, \
(offset))
#define ioat_read_4(ioat, offset) \
bus_space_read_4((ioat)->pci_bus_tag, (ioat)->pci_bus_handle, \
(offset))
#define ioat_read_8(ioat, offset) \
ioat_bus_space_read_8((ioat)->pci_bus_tag, (ioat)->pci_bus_handle, \
(offset))
#define ioat_read_double_4(ioat, offset) \
ioat_bus_space_read_8_lower_first((ioat)->pci_bus_tag, \
(ioat)->pci_bus_handle, (offset))
#define ioat_write_1(ioat, offset, value) \
bus_space_write_1((ioat)->pci_bus_tag, (ioat)->pci_bus_handle, \
(offset), (value))
#define ioat_write_2(ioat, offset, value) \
bus_space_write_2((ioat)->pci_bus_tag, (ioat)->pci_bus_handle, \
(offset), (value))
#define ioat_write_4(ioat, offset, value) \
bus_space_write_4((ioat)->pci_bus_tag, (ioat)->pci_bus_handle, \
(offset), (value))
#define ioat_write_8(ioat, offset, value) \
ioat_bus_space_write_8((ioat)->pci_bus_tag, (ioat)->pci_bus_handle, \
(offset), (value))
#define ioat_write_double_4(ioat, offset, value) \
ioat_bus_space_write_8_lower_first((ioat)->pci_bus_tag, \
(ioat)->pci_bus_handle, (offset), (value))
MALLOC_DECLARE(M_IOAT);
SYSCTL_DECL(_hw_ioat);
extern int g_ioat_debug_level;
struct generic_dma_control {
uint32_t int_enable:1;
uint32_t src_snoop_disable:1;
uint32_t dest_snoop_disable:1;
uint32_t completion_update:1;
uint32_t fence:1;
uint32_t reserved1:1;
uint32_t src_page_break:1;
uint32_t dest_page_break:1;
uint32_t bundle:1;
uint32_t dest_dca:1;
uint32_t hint:1;
uint32_t reserved2:13;
uint32_t op:8;
};
struct ioat_generic_hw_descriptor {
uint32_t size;
union {
uint32_t control_raw;
struct generic_dma_control control_generic;
} u;
uint64_t src_addr;
uint64_t dest_addr;
uint64_t next;
uint64_t reserved[4];
};
struct ioat_dma_hw_descriptor {
uint32_t size;
union {
uint32_t control_raw;
struct generic_dma_control control_generic;
struct {
uint32_t int_enable:1;
uint32_t src_snoop_disable:1;
uint32_t dest_snoop_disable:1;
uint32_t completion_update:1;
uint32_t fence:1;
uint32_t null:1;
uint32_t src_page_break:1;
uint32_t dest_page_break:1;
uint32_t bundle:1;
uint32_t dest_dca:1;
uint32_t hint:1;
uint32_t reserved:13;
#define IOAT_OP_COPY 0x00
uint32_t op:8;
} control;
} u;
uint64_t src_addr;
uint64_t dest_addr;
uint64_t next;
uint64_t next_src_addr;
uint64_t next_dest_addr;
uint64_t user1;
uint64_t user2;
};
struct ioat_fill_hw_descriptor {
uint32_t size;
union {
uint32_t control_raw;
struct generic_dma_control control_generic;
struct {
uint32_t int_enable:1;
uint32_t reserved:1;
uint32_t dest_snoop_disable:1;
uint32_t completion_update:1;
uint32_t fence:1;
uint32_t reserved2:2;
uint32_t dest_page_break:1;
uint32_t bundle:1;
uint32_t reserved3:15;
#define IOAT_OP_FILL 0x01
uint32_t op:8;
} control;
} u;
uint64_t src_data;
uint64_t dest_addr;
uint64_t next;
uint64_t reserved;
uint64_t next_dest_addr;
uint64_t user1;
uint64_t user2;
};
struct ioat_crc32_hw_descriptor {
uint32_t size;
union {
uint32_t control_raw;
struct generic_dma_control control_generic;
struct {
uint32_t int_enable:1;
uint32_t src_snoop_disable:1;
uint32_t dest_snoop_disable:1;
uint32_t completion_update:1;
uint32_t fence:1;
uint32_t reserved1:3;
uint32_t bundle:1;
uint32_t dest_dca:1;
uint32_t hint:1;
uint32_t use_seed:1;
/*
* crc_location:
* For IOAT_OP_MOVECRC_TEST and IOAT_OP_CRC_TEST:
* 0: comparison value is pointed to by CRC Address
* field.
* 1: comparison value follows data in wire format
* ("inverted reflected bit order") in the 4 bytes
* following the source data.
*
* For IOAT_OP_CRC_STORE:
* 0: Result will be stored at location pointed to by
* CRC Address field (in wire format).
* 1: Result will be stored directly following the
* source data.
*
* For IOAT_OP_MOVECRC_STORE:
* 0: Result will be stored at location pointed to by
* CRC Address field (in wire format).
* 1: Result will be stored directly following the
* *destination* data.
*/
uint32_t crc_location:1;
uint32_t reserved2:11;
/*
* MOVECRC - Move data in the same way as standard copy
* operation, but also compute CRC32.
*
* CRC - Only compute CRC on source data.
*
* There is a CRC accumulator register in the hardware.
* If 'initial' is set, it is initialized to the value
* in 'seed.'
*
* In all modes, these operators accumulate size bytes
* at src_addr into the running CRC32C.
*
* Store mode emits the accumulated CRC, in wire
* format, as specified by the crc_location bit above.
*
* Test mode compares the accumulated CRC against the
* reference CRC, as described in crc_location above.
* On failure, halts the DMA engine with a CRC error
* status.
*/
#define IOAT_OP_MOVECRC 0x41
#define IOAT_OP_MOVECRC_TEST 0x42
#define IOAT_OP_MOVECRC_STORE 0x43
#define IOAT_OP_CRC 0x81
#define IOAT_OP_CRC_TEST 0x82
#define IOAT_OP_CRC_STORE 0x83
uint32_t op:8;
} control;
} u;
uint64_t src_addr;
uint64_t dest_addr;
uint64_t next;
uint64_t next_src_addr;
uint64_t next_dest_addr;
uint32_t seed;
uint32_t reserved;
uint64_t crc_address;
};
struct ioat_xor_hw_descriptor {
uint32_t size;
union {
uint32_t control_raw;
struct generic_dma_control control_generic;
struct {
uint32_t int_enable:1;
uint32_t src_snoop_disable:1;
uint32_t dest_snoop_disable:1;
uint32_t completion_update:1;
uint32_t fence:1;
uint32_t src_count:3;
uint32_t bundle:1;
uint32_t dest_dca:1;
uint32_t hint:1;
uint32_t reserved:13;
#define IOAT_OP_XOR 0x87
#define IOAT_OP_XOR_VAL 0x88
uint32_t op:8;
} control;
} u;
uint64_t src_addr;
uint64_t dest_addr;
uint64_t next;
uint64_t src_addr2;
uint64_t src_addr3;
uint64_t src_addr4;
uint64_t src_addr5;
};
struct ioat_xor_ext_hw_descriptor {
uint64_t src_addr6;
uint64_t src_addr7;
uint64_t src_addr8;
uint64_t next;
uint64_t reserved[4];
};
struct ioat_pq_hw_descriptor {
uint32_t size;
union {
uint32_t control_raw;
struct generic_dma_control control_generic;
struct {
uint32_t int_enable:1;
uint32_t src_snoop_disable:1;
uint32_t dest_snoop_disable:1;
uint32_t completion_update:1;
uint32_t fence:1;
uint32_t src_count:3;
uint32_t bundle:1;
uint32_t dest_dca:1;
uint32_t hint:1;
uint32_t p_disable:1;
uint32_t q_disable:1;
uint32_t reserved:11;
#define IOAT_OP_PQ 0x89
#define IOAT_OP_PQ_VAL 0x8a
uint32_t op:8;
} control;
} u;
uint64_t src_addr;
uint64_t p_addr;
uint64_t next;
uint64_t src_addr2;
uint64_t src_addr3;
uint8_t coef[8];
uint64_t q_addr;
};
struct ioat_pq_ext_hw_descriptor {
uint64_t src_addr4;
uint64_t src_addr5;
uint64_t src_addr6;
uint64_t next;
uint64_t src_addr7;
uint64_t src_addr8;
uint64_t reserved[2];
};
struct ioat_pq_update_hw_descriptor {
uint32_t size;
union {
uint32_t control_raw;
struct generic_dma_control control_generic;
struct {
uint32_t int_enable:1;
uint32_t src_snoop_disable:1;
uint32_t dest_snoop_disable:1;
uint32_t completion_update:1;
uint32_t fence:1;
uint32_t src_cnt:3;
uint32_t bundle:1;
uint32_t dest_dca:1;
uint32_t hint:1;
uint32_t p_disable:1;
uint32_t q_disable:1;
uint32_t reserved:3;
uint32_t coef:8;
#define IOAT_OP_PQ_UP 0x8b
uint32_t op:8;
} control;
} u;
uint64_t src_addr;
uint64_t p_addr;
uint64_t next;
uint64_t src_addr2;
uint64_t p_src;
uint64_t q_src;
uint64_t q_addr;
};
struct ioat_raw_hw_descriptor {
uint64_t field[8];
};
struct bus_dmadesc {
bus_dmaengine_callback_t callback_fn;
void *callback_arg;
};
struct ioat_descriptor {
struct bus_dmadesc bus_dmadesc;
uint32_t id;
bus_dmamap_t src_dmamap;
bus_dmamap_t dst_dmamap;
bus_dmamap_t src2_dmamap;
bus_dmamap_t dst2_dmamap;
};
/* Unused by this driver at this time. */
#define IOAT_OP_MARKER 0x84
/*
* Deprecated OPs -- v3 DMA generates an abort if given these. And this driver
* doesn't support anything older than v3.
*/
#define IOAT_OP_OLD_XOR 0x85
#define IOAT_OP_OLD_XOR_VAL 0x86
/* One of these per allocated PCI device. */
struct ioat_softc {
bus_dmaengine_t dmaengine;
#define to_ioat_softc(_dmaeng) \
({ \
bus_dmaengine_t *_p = (_dmaeng); \
(struct ioat_softc *)((char *)_p - \
offsetof(struct ioat_softc, dmaengine)); \
})
device_t device;
int domain;
int cpu;
int version;
unsigned chan_idx;
bus_space_tag_t pci_bus_tag;
bus_space_handle_t pci_bus_handle;
struct resource *pci_resource;
int pci_resource_id;
uint32_t max_xfer_size;
uint32_t capabilities;
uint32_t ring_size_order;
uint16_t intrdelay_max;
uint16_t cached_intrdelay;
int rid;
struct resource *res;
void *tag;
bus_dma_tag_t hw_desc_tag;
bus_dmamap_t hw_desc_map;
bus_dma_tag_t data_tag;
bus_dma_tag_t comp_update_tag;
bus_dmamap_t comp_update_map;
uint64_t *comp_update;
bus_addr_t comp_update_bus_addr;
boolean_t quiescing;
boolean_t destroying;
boolean_t is_submitter_processing;
boolean_t intrdelay_supported;
boolean_t resetting; /* submit_lock */
boolean_t resetting_cleanup; /* cleanup_lock */
struct ioat_descriptor *ring;
union ioat_hw_descriptor {
struct ioat_generic_hw_descriptor generic;
struct ioat_dma_hw_descriptor dma;
struct ioat_fill_hw_descriptor fill;
struct ioat_crc32_hw_descriptor crc32;
struct ioat_xor_hw_descriptor xor;
struct ioat_xor_ext_hw_descriptor xor_ext;
struct ioat_pq_hw_descriptor pq;
struct ioat_pq_ext_hw_descriptor pq_ext;
struct ioat_raw_hw_descriptor raw;
} *hw_desc_ring;
bus_addr_t hw_desc_bus_addr;
#define RING_PHYS_ADDR(sc, i) (sc)->hw_desc_bus_addr + \
(((i) % (1 << (sc)->ring_size_order)) * sizeof(struct ioat_dma_hw_descriptor))
struct mtx_padalign submit_lock;
struct callout poll_timer;
struct task reset_task;
struct mtx_padalign cleanup_lock;
uint32_t refcnt;
uint32_t head;
uint32_t acq_head;
uint32_t tail;
bus_addr_t last_seen;
struct {
uint64_t interrupts;
uint64_t descriptors_processed;
uint64_t descriptors_error;
uint64_t descriptors_submitted;
uint32_t channel_halts;
uint32_t last_halt_chanerr;
} stats;
};
void ioat_test_attach(void);
void ioat_test_detach(void);
/*
* XXX DO NOT USE this routine for obtaining the current completed descriptor.
*
* The double_4 read on ioat<3.3 appears to result in torn reads. And v3.2
* hardware is still commonplace (Broadwell Xeon has it). Instead, use the
* device-pushed *comp_update.
*
* It is safe to use ioat_get_chansts() for the low status bits.
*/
static inline uint64_t
ioat_get_chansts(struct ioat_softc *ioat)
{
uint64_t status;
if (ioat->version >= IOAT_VER_3_3)
status = ioat_read_8(ioat, IOAT_CHANSTS_OFFSET);
else
/* Must read lower 4 bytes before upper 4 bytes. */
status = ioat_read_double_4(ioat, IOAT_CHANSTS_OFFSET);
return (status);
}
static inline void
ioat_write_chancmp(struct ioat_softc *ioat, uint64_t addr)
{
if (ioat->version >= IOAT_VER_3_3)
ioat_write_8(ioat, IOAT_CHANCMP_OFFSET_LOW, addr);
else
ioat_write_double_4(ioat, IOAT_CHANCMP_OFFSET_LOW, addr);
}
static inline void
ioat_write_chainaddr(struct ioat_softc *ioat, uint64_t addr)
{
if (ioat->version >= IOAT_VER_3_3)
ioat_write_8(ioat, IOAT_CHAINADDR_OFFSET_LOW, addr);
else
ioat_write_double_4(ioat, IOAT_CHAINADDR_OFFSET_LOW, addr);
}
static inline boolean_t
is_ioat_active(uint64_t status)
{
return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_ACTIVE);
}
static inline boolean_t
is_ioat_idle(uint64_t status)
{
return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_IDLE);
}
static inline boolean_t
is_ioat_halted(uint64_t status)
{
return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_HALTED);
}
static inline boolean_t
is_ioat_suspended(uint64_t status)
{
return ((status & IOAT_CHANSTS_STATUS) == IOAT_CHANSTS_SUSPENDED);
}
static inline void
ioat_suspend(struct ioat_softc *ioat)
{
ioat_write_1(ioat, IOAT_CHANCMD_OFFSET, IOAT_CHANCMD_SUSPEND);
}
static inline void
ioat_reset(struct ioat_softc *ioat)
{
ioat_write_1(ioat, IOAT_CHANCMD_OFFSET, IOAT_CHANCMD_RESET);
}
static inline boolean_t
ioat_reset_pending(struct ioat_softc *ioat)
{
uint8_t cmd;
cmd = ioat_read_1(ioat, IOAT_CHANCMD_OFFSET);
return ((cmd & IOAT_CHANCMD_RESET) != 0);
}
#endif /* __IOAT_INTERNAL_H__ */
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